-
8/12/2019 Receives SMS
1/6
//Developed by : Shefeek Jinnah//For Assistance visit :
http://www.shefeekj.com//or mail : [email protected]
using System;using System.Collections.Generic;using
System.Text;using System.Threading;namespace SMS{ //The function of
this class is to read message from a mobile and decrypt it
class ReceiveSMS {
SMSCOMMS SMSEngine; SendSMS obj = new SendSMS(); public static
string[] messageDetails;
public ReceiveSMS() { messageDetails = new string[3];
messageDetails[0] = ""; messageDetails[1] = ""; messageDetails[2] =
""; } //This function is the entry point to this class.All other
functions arecalled from this class
public void receiveSMS() { try { messageDetails[0] = "";
messageDetails[1] = ""; messageDetails[2] = ""; SMSCOMMS.pdu =
string.Empty; string pdu; string x = "COM20"; SMSEngine = new
SMSCOMMS(ref x); SMSEngine.Open(); // Open the Port in which
mobile
is connected SMSEngine.readSMS(); // Read SMS From Mobile
through Port SMSEngine.Close(); // Close Port if (SMSCOMMS.pdu==
"") { } else { messageDetails[0] =
decryptNumber(extractMessageCentre(SMSCOMMS.pdu)); // Decrypt
Message Centre Number messageDetails[1] =
decryptNumber(extractSenderNumber(SMSCOMMS.pdu)); // Decrypt Sender
Number messageDetails[2] =
DecryptMessage(ExtractMessageFromPdu(SMS
COMMS.pdu)); // Decrypt Message } }
-
8/12/2019 Receives SMS
2/6
catch (Exception ex) { } }
//The function is to extract Message centre number from PDU
public string extractMessageCentre(string pdu) { string[]
messageDetails = new string[3]; string extractedNumber =
string.Empty; try { for (int i = 4; i < 16; i++) {
extractedNumber = "" + extractedNumber + pdu.Substring(i, 1)+
"";
} } catch (Exception ex) { } return extractedNumber; }
//The function is to extract sender number from the PDU
public string extractSenderNumber(string pdu) { string
extractedNumber = string.Empty;
try { for (int i = 22; i < 34; i++) { extractedNumber = "" +
extractedNumber + pdu.Substring(i, 1)+ "";
} } catch (Exception ex) { } return extractedNumber; }
//The function is to Decrypt a number from PDU (Message Centre
Number &Sender Number)
public string decryptNumber(string number) { string[] receive =
new string[number.Length + 1]; string returnreceive = string.Empty;
try {
for (int i = 0; i < number.Length; i++) {
receive.SetValue(number.Substring(i, 1), i);
-
8/12/2019 Receives SMS
3/6
}
for (int i = 0; i < receive.Length; i++) { string swap; swap
= receive[i].ToString();
receive[i] = receive[i + 1].ToString(); receive[i + 1] = swap;
i++; if (i == number.Length - 1) { if (number.Length % 2 == 0) {
i++; } } } for (int i = 0; i < receive.Length; i++)
{ returnreceive = "" + returnreceive + receive[i].ToString()
+""; } } catch (Exception ex) {
} return returnreceive; }
//The Function is to extract Message in the encrypted format
from the PDU
public string ExtractMessageFromPdu(string pdu) { string msg =
string.Empty; try { for (int i = 54; i < pdu.Length; i++) { msg
= "" + msg + pdu.Substring(i, 1); } } catch (Exception ex) { }
return msg; }
// The two functions below decrypts message extracted from the
PDU
public string DecryptMessage(string msg) { int j = 0; string[]
bin = new string[1000];
try { string message = msg.Trim();
-
8/12/2019 Receives SMS
4/6
int count = 1, pos = 0; string[] hexInput = new
string[(msg.Length) / 2]; string[] splitstring = new string[8];
string[] binSeven = new string[100]; string concat = string.Empty;
string temp = string.Empty;
//Split entire string into pairs
for (int i = 0; i < message.Length - 1; i++) { hexInput[j] =
msg.Substring(i, 2); j++; i++;
}
//Convert each pair into 8 bit binary
for (int i = 0; i < j; i++) {
bin[i] = Convert.ToString(Convert.ToInt32(hexInput[i],
16),2);
while (bin[i].Length != 8) { bin[i] = "0" + bin[i] + ""; }
} } catch (Exception ex) { } //Passes a string array containing
8 bit binary values to the next function
return CovertFromHex(bin, j);
} //The input to this function is a string array containing 8
bit binary values equivalent to hex values
public string CovertFromHex(string[] hexValue, int length) {
string message = string.Empty; try { int count = 1, pos = 0;
string[] hexInput = new string[hexValue.Length]; string[]
splitstring = new string[8]; string[] bin = new string[1000];
string concat = string.Empty; string temp = string.Empty; for
(int i = 0; i < length; i++)
-
8/12/2019 Receives SMS
5/6
{
string extract = hexValue[i].ToString();
if (extract != string.Empty) { string[] x = new
string[count];
for (int k = 0; k < extract.Length; k++) {
if (k >= count) { concat = "" + concat + extract.Substring(k,
1) +""; } else {
x[k] = extract.Substring(k, 1);
} } bin[pos] = "" + concat + temp + ""; temp = string.Empty;
concat = string.Empty; count = count + 1; for (int j = 0; j <
x.Length; j++) { temp = "" + temp + x[j].ToString() + ""; } pos++;
if (count == 8) {
count = 1; bin[pos] = temp; temp = string.Empty; pos++;
} }
} bin[pos - 1] = "" + temp + bin[pos - 1].ToString() + "";
//Binary to ASCII string[] asciiVal = new string[pos]; for (int
i = 0; i < pos; i++) { asciiVal[i] =
Convert.ToInt64(bin[i].ToString(), 2).ToString();
}
for (int i = 0; i < pos; i++) {
message = "" + message +
char.ConvertFromUtf32(Convert.ToInt32(asciiVal[i].ToString()));
}
-
8/12/2019 Receives SMS
6/6
} catch (Exception ex) { } return message;
}
} }
